Method and apparatus for localization of an acoustic source

Details Method and apparatus for localization of an acoustic source Method and apparatus for localization of an acoustic source

G - Physics

01

S

G01S 3/802 (2006.01) G01S 3/808 (2006.01) H04N 7/15 (2006.01) H04R 3/00 (2006.01) H04S 1/00 (2006.01)

Patent

CA 2257444

An acoustic signal processing method and system using a pair of spatially separated microphones (10, 11) to obtain the direction (80) or location of speech or other acoustic signals from a common sound source (2) are disclosed. The invention includes a method and apparatus for processing the acoustic signals by determining whether signals acquired during a particular time frame represent the onset (45) or beginning of a sequence of acoustic signals from the sound source, identifying acoustic received signals representative of the sequence of signals, and determining the direction (80) of the source based upon the acoustic received signals. The invention has applications to videoconferencing where it may be desirable to automatically adjust a video camera, such as by aiming the camera in the direction of a person who has begun to speak.

L'invention concerne un procédé et un système permettant de traiter un signal acoustique au moyen d'une paire de microphones (10, 11) séparés dans l'espace pour obtenir la direction (80) ou la localisation de la voix ou d'autres signaux acoustiques provenant d'une source sonore commune (2). Selon l'invention, on traite les signaux acoustiques en déterminant si les signaux acquis durant une tranche de temps particulière représentent le départ (45) ou le début d'une séquence de signaux acoustiques provenant de la source sonore, on identifie les signaux acoustiques reçus représentatifs de la séquence de signaux, et on détermine la direction (80) de la source sur la base des signaux acoustiques reçus. L'invention trouve des applications dans le domaine de la vidéoconférence, où il peut être souhaitable de régler automatiquement une caméra vidéo, par exemple en la dirigeant dans la direction d'une personne ayant commencé à parler.

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